Prime numbers + multiplication principle - math problems

Number of problems found: 7

  • Wedding guests
    svatba_hatalovi Fifteen wedding guests could not agree on who would stand in the wedding photo. The groom suggested that all possible sets of wedding guests be made in the photographs.
  • Twenty-five
    prime How many three-digit natural numbers are divisible by 25?
  • Inverted nine
    clock-night-schr In the hotel,, Inverted nine" each hotel room number is divisible by 6. How many rooms we can count with three-digit number registered by digits 1,8,7,4,9?
  • Combinations
    circles How many different combinations of two-digit number divisible by 4 arises from the digits 3, 5 and 7?
  • Stacks
    euro_stacks Annie has a total of $ 702. The money must be divided into stacks so that each buyer has the same amounth of dollars. How many options she have?
  • No. of divisors
    triangle_div How many different divisors have number ??
  • Rectangles
    rectangles How many rectangles with area 8713 cm2 whose sides is natural numbers are?

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